Tax, financial, legal, and payroll advisory services for business and individuals.

Guidance that sets the direction, results that drive your growth.

Experience

Over 50 years of guiding business decisions.

A personal approach

Tailored solutions for every client.

Strategic vision

We anticipate, plan, and move you forward.

Trust

Growing together with our clients.

The DNA of our firm

We combine technical rigor with close and clear communication. We deeply involve ourselves in every project to ensure solid, personalized, and accessible decisions.

We work side by side with you, delivering the professional precision needed to understand your challenges, guide your strategy, and support you at every stage.

Get in touch with our team
The Castellà Tresserra team

Comprehensive advisory for businesses, freelancers, and individuals.

We are a dedicated management and advisory team guiding companies, freelancers, and individuals across all tax, financial, payroll, and legal matters.

Corporate advisory

We support major corporations and business groups in their daily operations and most critical decisions. From growth and expansion, corporate restructuring, and mergers and acquisitions (M&A), to managing large workforces and ensuring cross-border regulatory compliance.

Corporate advisory for international companies

We guide your company through setting up in Spain with expert tax, payroll, and legal advisory, ensuring the strategic application of international double taxation treaties.

We listen

We put ourselves in your position, delivering personalized solutions, speaking the same language—literally and figuratively.

Advisory services for SMEs

We help you scale up your SME here in Spain with expert tax, accounting, payroll, and legal advisory, alongside tailored feasibility studies and strategic business plans.

Advisory services for small and family businesses

We help you structure and protect your family and corporate wealth, while creating a strategic plan to transition it into the next generation through sound, proactive decision-making.

Expert advisory

We apply the greatest technical rigor drawing on decades of experience across tax, finance, employment, corporate, and civil law.

Advisory for freelancers

Comprehensive advisory for the self-employed including all tax, financial, payroll, and legal matters. We support you every step of the way—from your initial business registration to ongoing accounting and tax compliance.

Advisory for private individuals

Personal tax and wealth advisory for individuals: comprehensive support for your annual resident income tax return (Renta), inheritance and gift taxes, property transactions, covenants and private asset management.

Advisory services for non-residents

We provide all necessary support you if you have recently relocated to Spain or own property in the country. We manage your cross-border tax affairs, NIE application, changes to tax residency, and ongoing tax compliance obligations.

Long-term collaboration

We will help guide your business and wealth decisions over time, growing right alongside you, working hand in hand.

Let’s talk about your project

Tell us what you need. We are here to listen and support you with a clear, professional, and accessible response.

Get in touch